13501221402 has 16 divisors (see below), whose sum is σ = 27035830080. Its totient is φ = 4494842592.

The previous prime is 13501221361. The next prime is 13501221491. The reversal of 13501221402 is 20412210531.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1385878 + ... + 1395585.

It is an arithmetic number, because the mean of its divisors is an integer number (1689739380).

Almost surely, 2^13501221402 is an apocalyptic number.

13501221402 is an abundant number, since it is smaller than the sum of its proper divisors (13534608678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13501221402 is a wasteful number, since it uses less digits than its factorization.

13501221402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2782277.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 13501221402 its reverse (20412210531), we get a palindrome (33913431933).

The spelling of 13501221402 in words is "thirteen billion, five hundred one million, two hundred twenty-one thousand, four hundred two".